Photographic-plate holder



(No Model.)

0. WHITNEY. Y PHOTOGRAPHIO PLATE HOLDER.

Patented Feb. 10, 1891.

Z fw- DC II I 7 g/ J g X 1mm- MZM l i I 0 UNITED STATES PATENT Orrin.

CHARLES \VIIITNEY, OF CHICAGO, ILLINOIS.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 446,370, dated February 10, 1891.

Application filed September '7, 1889. Serial No 323,332. (No model.) Patented in Italy April 29, 1890, No. 27,256/333; in

Canada July 2,1890, No. 34,607, and in France July 17,1890, No. 204,797.

To all whom it may concern.-

Be it known that I, CHARLES IVHITNEY, a citizen of the United States, residing at Chi.- cago, in the county of Cook and State of Illinois, have invented a new and useful Photographic-Plate Holder for Cameras, (patented to me in France, No. 204,797, dated July 17, 1890; in Italy, No. 27,256/333, dated April 29, 1890, and in Canada, No. 34,607, dated July 2, 1890,) of which the following is a specification.

My invention relates to improvements in plate-holders for photographic cameras in which one or more friction feed-rollers are used; and the objects of my improvements are, first, to provide a receptacle for a loose coil of sensitized ribbon; second, to afford facilities for feeding it to position and for cutting the same at proper intervals, and, third, to measure the length for plate ,at each exposure. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a front view. Fig. 2 is a crosssection. Fig. is the knife and its supports. Fig. 4 is an additional method.

Similar letters referto similar parts th roughout the several views, in which- A is the main frame, and 13 the slide.

C is the thumb-wheel.

D is the lifting-bar attached to the slide.

E is the knife.

F is the knife-springs.

G is the guide-bar to the knife.

II is a tooth.

I is the feed-roller.

J is the'negative-plate.

K is the receptacle for negative-1'ibbon.

L is the ribbon coil.

M is a partition, and N is the receptacle for holding the expose-plates.

O is the stationary post across which the plate is drawn.

I is a pivoted bell-crank engaging with pin Q to operate the knife.

Fig. 4 is an additional method for operating the knife. X and X are gears, and I is a long tooth engaging with stop II.

In operation my invention is an attachment for cameras, and may be of different and between the feed-roller I and the boxframe A. The ribbon is held in position by pressure from the feedroller and by the posts 0 O. The surface of the friction feed-roller is of a yielding nature. I use rubber, but

. any other material may be used that will accomplish the same results, viz: the holding and feeding the negative-ribbon, and the negative ribbon or plates may be paper or any thin flexible material; however, I use and prefer transparent celluloid. I now replace the box-cover or side board and fasten the wheel 0 in the end of the feedroller I, which is done by screwing it into the shaft of the feed-roller. The plateholder in this position is ready for use by attaching to a common camera in place of the usual common plate-holder. \Vhen the attachment is made, one plate isin position for exposure. By drawing out the slide B the light from the camera-lens reaches the negative J. After exposure is made and the lens properly covered, another plate of the negative-ribbon is brought into place for exposure. This is done by turning the feedroller I by means of the thumb-wheel O in the direction indicated by the arrow, to the right. By the pressure of the feed-roller on the negative-ribbon a sufficient amount of friction is caused to draw from the receptacle, and also to push the exposed plate into the receptacle N. As shown in Fig. 2, the feedroller I in circumference is the exact size to bring the length for one exposure at each revolution, and the pin Q is so placed and timed relatively with the bell-crank P that the ribbon iscut. It will be seen that by this operation the negatives are sized and cut and placed in the receptacleN. The capacity for 7 with gearing for operating the knife.

one filling is from twenty-five to fifty, depending upon thethickness of the negative-ribbon used.

The operation of cutting the negative-ribbon is that when the feed-roller is revolved pin Q comes in contact with the pivoted bellcrank P, which brings the other end of 'the bell-crank in contact with the stop H on guide G, thus bringing the knife forward, and when pin Q passes or releases the bell-crank, the knife is brought back to place by the springs F. In Fig. 4 I show the same feed-roller, This arrangement isfor moving a plate of six and one-half inches, or twice the size of that shown in Fig. 2. i It will be seen that two revolutions of feed-roller I will make but one of gear X, and this arrangement is so timed that the long toothI" will come in contact withstop H in proper time to cut the ribbon as it is being brought to place. In this manner I am enabled to make a plate-holder of any desired size, and containing any desired number of plates.

Iam aware that plate-holder attachments have been made and used previous to my in-.

vention. Therefore, I do not claim plateholder attachments, broadly.

' What I claim is- 1. A camera attachment carrying a loose coil. of negative-ribbon and a friction feedroller adapted to feed the negative-ribbon by pressure against the frame A, substantially as described. I '2.'T-h e co1nbination of a plate-holder box, containing a separate compartment for the exposed plates, and a receptacle for a coil of negative-ribbon, a feed-roller and knife for cutting the ribbon, and mcans'for operating the-same, substantially as described.

The combination, in a plate-holder for cameras, of a coil of negative-ribbon,-a fricti on feed-roller andk-nife or shear for cutting lhenegative-ribbon, substantially as and for the purpose described.

4. In a, plate-bolder for cameras, a friction feed-rollerv adapted to engage the surface of one-side of the negative-ribbon, the opposite side of said ribbon being supported bya rigid wall, said feed-roller being also adapted for measuring the necessary amount of negativeribbon for each exposure, in combination with compartment M and knife E, substantially as described.

5. A plate-holder attachment for cameras, containing a-friction feed-roller and means for operating a knife or shear for cutting the ribbon at proper intervals when one, two, or more revolutions are required for each plate, substantially as described.

6. In a plate-holder attach ment for cameras, a loose coil of negative-ribbon and a friction feed'roller, with suitable friction between the feed-roller and the negative coil to hold it in proper position, in combination with knifeE, and slotted tube K, substantially as described.

7. A plate ho'lder attachment for cameras, containing a lo ose coil of negative-ribbon and means for shearing or cutting the same at proper intervals, substantially as described.

8. In a roll-holder for cameras, the slotted tube K and the -coil of negative-ribbon L, in combination with the friction feed-roller c0- operating with the Wall of the device to feed the ribbon, substantially as described.

9. In a roll-holder for cameras, the slotted "tube K, made attachable and detachable and held in position by the bar Y, and containing a loose coil of negative-ribbon, in combination with the knife or shear=E and compartn1ent N, substantially asdescribed.

10. In a camera, the attachable and detachable slotted tube Kand a loose coil of negative-ribbon properly sensitized contained insaid tube, and a tongue-and-groove connection between the tube and case, whereby the tube may be readilyinserted into-and removed from the case without disturbing the remaining operative parts of the camera, substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses. CHARLES WVHITNEY.

Witnesses: I

MARIE L, PRICE, JAMES H. PRICE. 

